24kV SF₆ Gas Insulated Compact Ring Main Unit (RMU)

The Changyun Intelligent XGN18-24 24kV SF₆ Gas-Insulated Compact Ring Main Unit (RMU) is a high-performance, modular medium-voltage switchgear specifically designed for 3-phase AC 50Hz, 24kV power distribution systems. Utilizing SF₆ gas as both the insulation and arc-extinguishing medium, the fully sealed stainless steel gas tank provides exceptional electrical insulation, reliable switching performance, and long-term operational stability while achieving an IP67 protection rating.

Designed with a flexible modular structure, the XGN18-24 can be configured into various standard functional units, including incoming units (incoming feeder panels), outgoing feeders, bus sectionalizing, metering units, 24kV load switch units, switch-fuse combinations, and vacuum circuit breaker (VCB) modules. This versatile configuration enables the switchgear to meet the diverse requirements of utility networks, industrial facilities, renewable energy projects, and commercial power distribution systems.

Its compact footprint makes installation significantly easier in space-constrained environments such as urban substations, commercial buildings, underground distribution rooms, and prefabricated substations. The sealed enclosure effectively protects internal components against dust, humidity, and environmental contamination, minimizing routine maintenance and extending service life.

Manufactured in strict accordance with IEC standards, the XGN18-24 delivers high reliability, personnel safety, and superior electrical performance. Furthermore, all technical specifications comply with Indonesia PLN technical requirements, making it an ideal 24kV switchgear solution for medium-voltage distribution projects across Indonesia and global international markets.

• Superior Sealing Performance: The fully sealed stainless-steel gas tank features an extremely low annual SF₆ leakage rate, ensuring maintenance-free operation while protecting internal components from moisture, dust, and harsh environmental conditions.

• Compact and Space-Saving Design: Its modular and compact structure significantly reduces installation space, making it ideal for urban substations, commercial buildings, industrial plants, and prefabricated substations.

• Safe and Reliable Operation: Equipped with complete mechanical interlocking and comprehensive Five-Protection functions to prevent incorrect operation. Integrated with reliable load switch and vacuum circuit breaker (VCB) modules, optional motor-operated mechanisms support remote monitoring, remote control, and distribution automation systems.

• Flexible Modular Configuration: Can be configured with incoming units, load break switches, vacuum circuit breakers (VCB), switch-fuse combinations, metering units, and diverse feeder arrangements to satisfy bespoke project requirements.

• Excellent Environmental Adaptability: Engineered for reliable operation in tropical and demanding environments, offering high protection ratings and outstanding resistance to humidity, pollution, salt spray, and harsh outdoor conditions.

• Low Maintenance and Long Service Life: The sealed gas-insulated structure minimizes routine maintenance while ensuring stable electrical performance and a service life exceeding 30 years under normal operating conditions.

• Improve overall power distribution reliability

• Reduce long-term maintenance and operating costs

• Save valuable installation space with a compact RMU design

• Enhance operator and personnel safety

• Increase network operational efficiency

• Support future system expansion and scalability

• Minimize unexpected equipment downtime

• Fully optimized for smart grid and distribution automation applications

The XGN18-24 SF₆ Ring Main Unit operates by distributing medium-voltage electrical power safely through a ring network structure. The sealed SF₆ gas-insulated tank provides robust insulation and reliable arc-extinguishing capability during switching operations.

The incoming unit typically integrates a high-performance load switch for normal load breaking and making, while optional vacuum circuit breaker (VCB) modules deliver efficient short-circuit fault interruption and system protection. The modular design enables flexible feeder combinations and allows a continuous power supply even when one network section requires maintenance or isolation, thereby maximizing the reliability of the entire distribution grid.

• Urban ring network distribution systems

• Utility substations and 24kV power distribution networks

• Industrial parks and manufacturing facilities

• Commercial complexes and shopping malls

• High-rise office buildings and residential developments

• Outdoor distribution kiosks and compact substations

• Wind farms and solar photovoltaic power stations

• Mining operations, airports, and railway infrastructure

• Smart grid and distribution automation projects

Changyun Intelligent is a trusted global manufacturer committed to delivering high-reliability, cost-effective medium-voltage switchgear solutions worldwide.

• 17+ years of professional manufacturing experience

• Customized OEM & ODM services tailored for global partners

• Certified IEC-compliant switchgear products

• Rigorous factory quality control procedures

• Competitive factory-direct pricing

• Fast production turnaround and reliable global delivery

• Comprehensive technical support from experienced electrical engineers

• Extensive export experience in international power distribution projects

An SF₆ Ring Main Unit (RMU) is a compact medium-voltage switchgear engineered for secondary power distribution systems. It utilizes SF₆ gas as both the insulation and arc-extinguishing medium, ensuring exceptional electrical performance, high reliability, and low maintenance requirements. The Changyun Intelligent XGN18-24 RMU features a fully sealed stainless-steel tank with IP67 protection, making it ideal for long-term deployment in harsh, demanding environments. It is widely used across utility networks, industrial facilities, and commercial complexes.

The XGN18-24 SF₆ RMU delivers an optimal balance of reliability, safety, and flexibility for modern 24kV power distribution systems. Its compact space-saving design minimizes physical installation footprints, while the sealed gas-insulated tank protects internal components from dust, humidity, and moisture. Its modular structure supports diverse feeder configurations, and the built-in mechanical interlocking system maximizes operational safety.

While both RMU and GIS (Gas-Insulated Switchgear) utilize gas insulation, they serve distinct applications. An RMU is primarily designed for medium-voltage secondary distribution networks, offering a compact and cost-effective solution for commercial, industrial, and utility loop networks. Conversely, traditional GIS is typically deployed in primary high-voltage transmission substations requiring heavier current ratings and complex protection schemes. For 12kV and 24kV distribution setups, an SF₆ Ring Main Unit provides the ultimate balance of performance and investment economy.

Changyun Intelligent manufactures medium-voltage switchgear in 12kV and 24kV voltage classes to match diverse network specifications. We offer multiple functional unit combinations—including incoming units, load switch modules, vacuum circuit breakers (VCB), switch-fuse units, and metering units—along with fully customized configurations based on single-line diagrams and local utility guidelines.

Yes. Changyun Intelligent provides comprehensive OEM and ODM manufacturing services for global switchgear manufacturers, electrical distributors, EPC contractors, and utility operators. We customize branding, nameplates, panel paint colors, electrical configurations, busbar layouts, protection schemes, and packaging to meet target market standards.

Our XGN18-24 SF₆ Ring Main Unit is built strictly in accordance with IEC 62271 standards for medium-voltage switchgear. Every switchgear panel undergoes rigorous factory testing prior to shipment, covering mechanical operation, insulation integrity, power-frequency withstand voltage, gas leakage inspection, and functional verification. The design also fulfills the technical demands of Indonesia PLN.

Standard production lead time typically ranges from 20 to 35 days post-order confirmation, varying with specific configurations and order quantities. For customized projects or bulk orders, our sales engineering team provides a clear production timeline beforehand and assists with export documentation and shipping logistics.

Changyun Intelligent delivers robust technical support across the entire product lifecycle, spanning pre-sale selection assistance, technical consultation, installation manuals, troubleshooting guidelines, and spare parts availability. Our expert team is dedicated to ensuring safe installation and long-term operational performance.